The frum voters are such a teeny weeny portion of the electorate, and in only one state – New York, which in presidential elections, is reliably Democratic – that no candidate cares about their votes. I think Trump pretended to care, and made some nominally pro-Israel policy decisions, only to get the financial backing of Sheldon Adelson. Not that there is anything wrong with that.
But keep in mind that Trump also got support from anti-Semites like the “Proud Boys” and right-wing anti-Semitic militias. On balance, Trump’s loss is good for the Jews.